Uploaded by SunsFlare on 11 Mar 2012[Note: also uploaded by several other people] "I just came across something extremely curious. There is a black spherical anomaly the size of Jupiter on the south east limb of the sun. I have no idea what this may be."

Uploaded by www.thesuntoday.org on 13 Mar 2012 Video by Dr Alex Young, NASA's Goddard Space Flight CentreOn March 12, 2012 Sunsflare posted a video asking if anyone could identify a circular object seen in SDO coronal images. The video was also posted on Facebook with the same question posed.

I answered the question on facebook but here is a more detailed response and discussion of the observation. The object seen is a coronal cavity associated with a filament. There was also an eruption of the filament with a CME.